Hass.io (Supervisor) section doesn't load

I can see the Hass.io menu tab in my left-hand side menu, but when I click it nothing happens, I just get a white page (192.168.1.111:8123/hassio).

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Has anyone else had this issues and solved it?

Did you try a wipe cache of your browser? Tried another browser?

Yep, I’ve wiped the cache in Chrome and tried Firefox in addition to Chrome.